Magma that forms batholiths forms in the mantle and must migrate upward. However, the sedimentary and metamorphic rocks that surround these batholiths are only moderately deformed
How does a rising magma body make its way through several kilometers of solid rock to be emplaced as a batholith? (Start your journey in the mantle.)
What will be an ideal response?
Answer: Magma is less dense than the surrounding rock and rises. While in the mantle, it is able to shoulder the ductile material aside. When rising through more rigid rock, a mantle can assimilate material or dislodge country rock through stoping.
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